[en] [Gutenberg 62994] • Craters of the Moon / A Guide to Craters of the Moon National Monument, Idaho Interior Dept., National Park Service, Division of Publications
[en] [Gutenberg 49966] • Geology of Devils Tower National Monument, Wyoming / A Contribution to General Geology U.S. Department of the Interior
[en] [Gutenberg 52838] • Creation of the Teton Landscape: The Geologic Story of Grand Teton National Park Grand Teton Association
[en] [Gutenberg 51048] • The Geologic Story of Canyonlands National Park Forgotten Books
[en] [Gutenberg 60574] • The Geologic Story of Yellowstone National Park Forgotten Books
[en] Geology by Design (Design Series) Master Books
[en] [Gutenberg 62871] • Thoughts on a Pebble, or, A First Lesson in Geology Andesite Press
[en] [Gutenberg 64325] • Landscape in History, and Other Essays Palala Press
[en] [Gutenberg 42356] • On the Red Chalk of England Wentworth Press
[en] [Gutenberg 60556] • The Parochial History of Cornwall, Volume 2 (of 4) Andesite Press
[en] [Gutenberg 46969] • The Geologic Setting of the John Day Country: Grant County, Oregon UNITED STATES DEPARTMENT OF THE INTERIOR/ GEOLOGICAL SURVEY
[en] [Gutenberg 33925] • The Geological Story of the Isle of Wight Echo Library